AMC3330DWER

Overview

The AMC3330DWER is a precision, reinforced isolated amplifier with an integrated DC/DC converter. It operates on a single 3.3V or 5V supply and features a ±1V differential input range optimized for high-impedance voltage sensing. The device provides a fixed gain of 2.0 V/V with low DC errors, including a maximum gain error of ±0.2% and offset error of ±0.3mV. It offers high common-mode transient immunity of 85kV/µs minimum and meets safety certifications such as DIN EN IEC 60747-17 (VDE 0884-17) and UL1577. The component is housed in a 16-pin SOIC package.

Feature Summary

• Integrated isolated DC/DC converter enables single-supply operation from the low-side.
• Reinforced capacitive isolation barrier certified to international safety standards.
• High common-mode transient immunity supports accurate measurement in noisy environments.
• System-level diagnostic features include fault detection and status output.

Applications

• Isolated voltage sensing in motor drives
• Photovoltaic inverters
• Power delivery systems
• EV charging infrastructure
• Battery energy storage systems

Procurement Notes

Verify that the specific part number matches the required package type and temperature rating. Confirm compliance with relevant safety certifications for your application's regulatory requirements. Ensure proper layout practices are followed to maintain creepage and clearance distances specified in the datasheet. Check for any recent documentation updates regarding pin functions or electrical characteristics before finalizing the design.

Selection Notes

Select this component when high-precision voltage sensing with reinforced isolation is required. The integrated DC/DC converter simplifies power supply design by allowing single-supply operation. Consider the fixed gain of 2.0 V/V and the ±1V input range when designing the signal conditioning circuitry. Evaluate the thermal performance and safety limiting values to ensure reliable operation under all expected conditions.

Part Context

The AMC3330 belongs to Texas Instruments' family of precision isolated amplifiers. It is designed for applications requiring galvanic isolation between high-voltage domains and low-voltage control circuits. The device integrates both the signal path and the isolated power supply, reducing component count and board space. It is suitable for industrial and automotive applications where safety and accuracy are critical.

Replacement Considerations

AMC3330EVM is an evaluation module for the AMC3330 series, not a direct replacement. No other specific replacement part numbers are documented in the provided source material.

FAQ

What is the maximum repetitive peak isolation voltage?

The maximum repetitive peak isolation voltage (VIORM) is 1700 VPK according to DIN EN IEC 60747-17.

How does the device handle input signals outside the linear range?

The device clips the output when the differential input voltage exceeds ±1.25V, providing a clipping differential output voltage of ±2.49V.

What is the purpose of the DIAG pin?

The DIAG pin is an active-low, open-drain digital output that serves as a status indicator for system-level diagnostics, such as detecting DC/DC converter or LDO undervoltage faults.